US5554910A - Elastic restraint for flat panel displays - Google Patents

Elastic restraint for flat panel displays Download PDF

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Publication number
US5554910A
US5554910A US08/312,865 US31286594A US5554910A US 5554910 A US5554910 A US 5554910A US 31286594 A US31286594 A US 31286594A US 5554910 A US5554910 A US 5554910A
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United States
Prior art keywords
rear panel
flat
image display
display apparatus
hole
Prior art date
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Expired - Lifetime
Application number
US08/312,865
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English (en)
Inventor
Hiroshi Aono
Mitsunori Yokomakura
Mitsunori Katano
Michiaki Watanabe
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Publication date
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Assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. reassignment MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AONO, HIROSHI, KATANO, MITSUNORI, WATANABE, MICHIAKI, YOKOMAKURA, MITSUNORI
Priority to US08/530,642 priority Critical patent/US6109993A/en
Application granted granted Critical
Publication of US5554910A publication Critical patent/US5554910A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/15—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen with ray or beam selectively directed to luminescent anode segments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
    • H01J31/126—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using line sources
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/028—Mounting or supporting arrangements for flat panel cathode ray tubes, e.g. spacers particularly relating to electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/18—Assembling together the component parts of electrode systems
    • H01J9/185—Assembling together the component parts of electrode systems of flat panel display devices, e.g. by using spacers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/241—Manufacture or joining of vessels, leading-in conductors or bases the vessel being for a flat panel display
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/261—Sealing together parts of vessels the vessel being for a flat panel display
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00—Electron emission display panels, e.g. field emission display panels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00—Electron emission display panels, e.g. field emission display panels
    • H01J2329/86—Vessels
    • H01J2329/8625—Spacing members

Definitions

  • the present invention relates to a flat image display apparatus which is to be used in a television receiver and a display unit for computers or the like.
  • a flat type image display apparatus is disclosed in unexamined published Japanese application (TOKKAI) HEI 3-67444. This type of flat image display apparatus is generally characterized as follows:
  • a distance between a cathode and an anode is remarkably shorter than that of a conventional cathode-ray tube type.
  • a fluorescent screen is divided horizontally and vertically into matrix arrangement of plurality of plural small segments, and each of the small segments is scanned by deflecting one electron beam which is separated from the other electron beams.
  • Fluorescent dots of R (red), G (green) and B (blue) for one picture element in the small segment are shot in turn by the electron beam.
  • the amount of irradiation is controlled by color picture signals.
  • the flat type image display apparatus generally comprises a flat box-shaped vacuum case including plural linear hot cathodes and a flat-shaped electrode unit.
  • Each linear hot cathode (hereinafter referred to as "linear cathode") serves as a generator of the electron beam.
  • the flat-shaped electrode unit has plural holes and plural slits for deflecting, focussing and controlling the electron beam.
  • the electron beam emitted from each linear cathode passes through the holes and the slits. Thereby, the electron beam reaches the fluorescent screen via the above-mentioned steps of deflecting, focussing and controlling.
  • the fluorescent screen emits light, and a television moving picture is reproduced on the fluorescent screen.
  • FIG. 8 is a perspective view showing the flat type image display apparatus.
  • FIG. 9 is a cutaway perspective view, which is taken on line IX--IX of FIG. 8, showing a part of the flat type image display apparatus.
  • FIG. 10 is an exploded perspective view showing the general construction of a main part of the flat type image display apparatus.
  • the flat type image display apparatus 100 has a vacuum case constituted by a front housing 1 and a rear panel 2.
  • the front housing 1 and the rear panel 2 are made of glass which has a predetermined thickness, for example, 10 mm.
  • Peripheral parts of the front housing 1 are fixed to the rear panel 2 by a bonding glass member 3, such as a soldering glass.
  • the melting point of the bonding glass member 3 is selected lower than that of the front housing 1 or the rear panel 2, and the bonding glass member 3 seals the vacuum case via a melting and recrystallization
  • An evacuation pipe 4 for evacuating the vacuum case and a high voltage terminal 5 of the anode are provided on the edge of the front housing 1.
  • Plural output terminals 6 are led out of the vacuum case through the bonding glass member 3.
  • each of the plural output terminals 6 is connected to a flat-shaped electrode unit 7.
  • the other end of each of the plural output terminals 6 is connected to external circuits (not shown), for example, a driving circuit and signal processing circuit.
  • the flat-shaped electrode unit 7 is constituted by plural flat-shaped electrodes 7a-7g (FIG. 10). At four corners of the flat-shaped electrode unit 7, four securing screws 8a-8d (FIG. 11) set the flat-shaped electrode unit 7 on a conventional supporting unit 14 (FIG. 11), respectively.
  • the main part of the flat type image display apparatus 100 comprises a back electrode 9, plural linear cathodes 10a-10c and the flat-shaped electrode unit 7.
  • the back electrode 9, plural linear cathodes 10a-10c and the flat-shaped electrode unit 7 are provided from the rear panel 2 toward the front housing 1.
  • the back electrode 9 is mounted on the inner surface of the rear panel 2.
  • the linear cathodes 10a-10c are horizontally stretched so as to be in parallel with the back electrode 9.
  • the linear cathodes 10a-10c act as an electron beam source. Although only three pieces of the linear cathodes 10a-10c are shown in FIG. 10, there are actually many linear cathodes (e.g. 44 pieces).
  • the flat-shaped electrode unit 7 comprises an electron beam extracting electrode 7a, a modulation electrode 7b, a vertical focussing electrode 7c, a horizontal focussing electrode 7d, a horizontal deflection electrode 7e, a shield electrode 7f and a vertical deflection electrode 7g.
  • the respective electrodes 7a-7g are bonded with each other keeping respective predetermined gaps held therebetween, and they are electrically insulated from each other by respective vitreous insulators (not shown).
  • the electrons emitted from the linear cathode 10b are conducted by an extracting hole 11 of the electron beam extracting electrode 7a to form the electron beam 12. Thereafter, the electron beam 12 passes through holes and slits of the other electrodes 7b, 7c, 7d, 7e, 7f and 7g, thereby being focussed and deflected. Finally, the electron beam 12 reaches a small segment 13a of a fluorescent screen 13 formed on the inner surface of the front housing 1. Many fluorescent dots of R, G and B colors are provided on the small segment 13a by printing and coating. The small segment 13a emits light when the electron beam 12 lands on the fluorescent dots of the small segment 13a.
  • the fluorescent screen 13 is divided into only 3 pieces in a vertical line and only 7 pieces in a horizontal line, the fluorescent screen 13 is actually divided into many small segments, such as 44 pieces in the vertical line and 221 pieces in the horizontal line, a total of 9724 pieces.
  • FIG. 11 is an explanatory view showing a conventional supporting unit for the flat-shaped electrode unit.
  • FIG. 12 is a partially sectional view, which is taken on line Z--Z of FIG. 8, showing the mounting construction of the conventional supporting unit at a corner part of the flat type image display apparatus.
  • the conventional supporting unit 14 for the flat-shaped electrode unit 7 comprises six setting mounts 15a-15f, a pair of securing members 16a and 16b and a pair of supporting members 17a and 17b.
  • the melting point of the bonding glass member 19 is selected lower than that of the rear panel 2.
  • Two securing screws 18a and 18b are set at both end parts of the securing member 16a on the setting mounts 15a and 15b, respectively.
  • securing screws 18d and 18e are set at both end parts of the securing member 16b on the setting mounts 15d and 15e, respectively.
  • a securing screw 18c sets the intermediate part of the supporting member 17a on the setting mount 15c so that both ends of the supporting member 17a are put on one end of the securing members 16a and 16b, respectively.
  • a securing screw 18f sets the intermediate part of the supporting member 17b on the setting mount 15f so that both ends of the supporting member 17b are put on the other end of the securing member 16a and 16b, respectively.
  • the respective ends of the supporting members 17a and 17b are put on the respective ends of the securing members 16a and 16b.
  • the securing members 16a and 16b and the supporting members 17a and 17b form a rectangle shaped frame on the six setting mounts 15a-15f.
  • An insulating film 20 (FIG. 12) is provided on the upper surface of the supporting members 17a and 17b, and the flat-shaped electrode unit 7 (FIG. 10) is disposed further thereon.
  • the flat-shaped electrode unit 7, the supporting members 17a and 17b and the securing members 16a and 16b are fixed to each other by four securing screws 8a-8d.
  • a securing position of the securing screw 8a is located at the part outside with respect to the setting mount 15a in relation to the center part of the rear panel 2
  • a securing position of the securing screw 8b is located at the part outside with respect to the setting mount 15b in relation to the center part of the rear panel 2.
  • a securing position of the securing screw 8c is located at the part outside with respect to the setting mount 15d in relation to the center part of the rear panel 2
  • a securing position of the securing screw 8d is located at the part outside with respect to the setting mount 15e in relation to the center part of the rear panel 2.
  • each of the flat-shaped electrodes 7a-7g of the flat-shaped electrode unit 7 is disposed in a predetermined position between the back electrode 9 and the fluorescent screen 13 by the conventional supporting unit 14.
  • Insulating washers 21 are provided between every two flat-shaped electrodes around the securing screws 8a.
  • a metal-backed layer 22 is provided on the inner surface of the fluorescent screen 13.
  • the electron beam is required to make an exact scanning on the fluorescent screen 13 without mislanding. Therefore, it is necessary that the supporting unit 14 holds the flat-shaped electrode unit 7 at the predetermined position with precision of a micron order.
  • the flat type image display apparatus 100 is repeatedly exposed to a high temperature during the manufacturing process and heated until completion of its assembly as follows:
  • the flat type image display apparatus 100 is put in the baking oven at the temperature of 300° C. to 350° C.
  • linear cathode 10 is heated at the temperature of 600° C. to 700° C. for generating the electron beam, the inside space is exposed to radiation from linear cathode 10 during the operation of the flat type image display apparatus 100.
  • the rear panel 2, the flat-shaped electrode unit 7 and the frame of the conventional supporting unit 14 are made of different materials from each other. Namely, in the rear panel 2, the flat-shaped electrode unit 7 and the frame of the conventional supporting unit 14, degrees of the thermal deformations are different from each other because of differences of coefficient of thermal expansion and thermal capacity. When the flat type image display apparatus 100 is heated, degrees of the thermal deformations become larger in order of the frame of the conventional supporting unit 14, the rear panel 2 and the flat-shaped electrode unit 7.
  • the conventional supporting unit 14 can not hold the flat-shaped electrode unit 7 at the predetermined position precisely. As a result, it is impossible to make an exactly scanning of the electron beam on the fluorescent screen 13. Accordingly, there is a problem that the high definition image is not reproduced on the fluorescent screen 13.
  • FIG. 11 when the flat type image display apparatus 100 is heated, the rear panel 2 is expanded into the rear panel 2' shown by dashed lines. Similarly, the supporting members 17a and 17b are deformed into the supporting members 17a' and 17b' shown by dashed lines, respectively.
  • Plural arrows A, B, C, D,-P designate respective directions of the thermal deformation of the rear panel 2. In order to understand the thermal deformation easily, the rear panel 2' and the supporting members 17a' and 17b' are shown in FIG. 11 exaggeratedly.
  • the flat-shaped electrode unit 7, the supporting members 17a and 17b and the securing members 16a and 16b are fixed to each other by four securing screws 8a-8d at four corners of the supporting unit 14. Therefore, in the securing members 16a and 16b and the supporting members 17a and 17b, those degrees of the thermal deformation are limited by the flat-shaped electrode unit 7 via the four securing 8a-8d. Furthermore, the intermediate parts of the supporting member 17a and 17b is fixed to the setting mounts 15c and 15f, respectively. Accordingly, the respective intermediate parts are deformed more than the respective end parts by the thermal deformation of the rear panel 2 as shown in FIG. 11.
  • the conventional supporting unit 14 can not hold the flat-shaped electrode unit 7 at the predetermined position precisely after the inside space of the flat type image display apparatus 100 is evacuated.
  • the object of the present invention is to provide a flat type image display apparatus that can solve the aforementioned problems.
  • a flat type image display apparatus in accordance with the present invention comprises:
  • a vacuum case having a front housing and a rear panel
  • a fluorescent screen formed on an inner surface of the front housing
  • a back electrode formed on an inner surface of the rear panel
  • a supporting unit for holding the flat-shaped electrode unit and having a substantially rectangle shaped frame and resilient retaining.
  • the substantially rectangle shaped frame holds the flat-shaped electrode unit, wherein four intermediate parts of the substantially rectangle shaped frame are fixed to the rear panel.
  • Four corners of the substantially rectangle shaped frame are held elastically with each other by the resilient retaining means.
  • the substantially rectangle shaped frame which holds the flat-shaped electrode unit, is fixed to the rear panel at four intermediate parts of the frame; and the frame is elastically held by the resilient retaining means at four corners of the frame.
  • the resilient retaining means eliminates adverse influences of, or absorbs, a difference in degrees of deformations among the rear panel, the flat-shaped electrode unit and the frame. In general at the four corners of the frame the differences the positional difference due to thermal deformations among the rear panel, the flat-shaped electrode unit and the frame are most. Furthermore, the resilient retaining means absorbs most the difference without giving an undesirable stress to the flat-shaped electrode unit. As a result, it is possible to make an exact scan of the electron beam on the fluorescent screen. Accordingly, a high definition image can be reproduced on the fluorescent screen.
  • FIG. 1 is an explanatory view showing a supporting unit for a flat-shaped electrode unit in accordance with the present invention
  • FIG. 2 is an exploded perspective view showing the construction of the supporting unit in accordance with the present invention
  • FIG. 3 is a partially sectional view, which is taken on line Z--Z of FIG. 8, showing the mounting construction of the supporting unit of the present invention at a corner part of the flat type image display apparatus,
  • FIG. 4A is an enlarged view of welding parts between the securing member 53a and the setting mount 52b,
  • FIG. 4B is a sectional view, which is taken on line W--W of FIG. 4A, showing welding parts between the securing member 53a and the setting mount 52b,
  • FIG. 5 is an enlarged view showing resilient retaining means of the present invention
  • FIG. 6 is a lateral view showing the supporting unit in accordance with the present invention.
  • FIG. 7 is a front view of a modified version of the supporting unit in accordance with the preferred embodiment of the present invention.
  • FIG. 8 is a perspective view showing the flat type image display apparatus
  • FIG. 9 is a cutaway perspective view, which is taken on line IX--IX of FIG. 8, showing a part of the flat type image display apparatus,
  • FIG. 10 is an exploded perspective view showing general construction of a main part of the flat type image display apparatus
  • FIG. 11 is an explanatory view showing a conventional supporting unit for the flat-shaped electrode unit.
  • FIG. 12 is a partially sectional view, which is taken on line Z--Z of FIG. 8, showing the mounting construction of the conventional supporting unit at a corner part of the flat type image display apparatus.
  • FIG. 8 is a perspective view showing the flat type image display apparatus.
  • FIG. 9 is a cutaway perspective view, which is taken on line IX--IX of FIG. 8, showing a part of the flat type image display apparatus.
  • FIG. 10 is an exploded perspective view showing the general construction of a main part of the flat type image display apparatus.
  • the flat type image display apparatus 100 has a vacuum case constituted by a front housing 1 and a rear panel 2.
  • the front housing 1 and the rear panel 2 are made of glass which has a predetermined thickness, for example, 10 mm.
  • Peripheral parts of the front housing 1 are fixed to the rear panel 2 by a bonding glass member 3, such as a soldering glass.
  • the melting point of the bonding glass member 3 is selected lower than that of the front housing 1 or the rear panel 2, and the bonding glass member 3 seals the vacuum case via a melting and recrystallization.
  • An evacuation pipe 4 for evacuating the vacuum case and a high voltage terminal 5 of an anode are provided on the edge of the front housing 1.
  • Plural output terminals 6 are led out of the vacuum case through the bonding glass member 3.
  • one end of the plural output terminals 6 are connected with a flat-shaped electrode unit 7.
  • the other end of the plural output terminals 6 are connected with external circuits (not shown), for example, a driving circuit and signal processing circuit.
  • the flat-shaped electrode unit 7 is constituted by plural flat-shaped electrodes 7a-7g (FIG. 10). At four corners of the flat-shaped electrode unit 7, four securing screws 8a-8d (FIG. 1) set the flat-shaped electrode unit 7 on a supporting unit 51 (FIG. 1) of the present invention, respectively.
  • the main part of the flat type image display apparatus 100 comprises a back electrode 9, plural linear cathodes 10a-10c and the flat-shaped electrode unit 7.
  • the back electrode 9, plural linear cathodes 10a-10c and the flat-shaped electrode unit 7 are provided from the rear panel 2 toward the front housing 1.
  • the back electrode 9 is mounted on the inner surface of the rear panel 2.
  • the linear cathodes 10a-10c are horizontally stretched by a pair of heat-resistant insulating frames 50a and 50b (FIG. 1) so as to be in parallel with the back electrode 9.
  • the linear cathodes 10a-10c act as an electron beam source. Although only three pieces of the linear cathodes 10a-10c are shown in FIG. 10, there are actually many linear cathodes (e.g. 44 pieces).
  • the flat-shaped electrode unit 7 comprises an electron beam extracting electrode 7a, a modulation electrode 7b, a vertical focussing electrode 7c, a horizontal focussing electrode 7d, a horizontal deflection electrode 7e, a shield electrode 7f and a vertical deflection electrode 7g.
  • the respective electrodes 7a-7g are bonded with each other keeping respective predetermined gaps held therebetween, and they are electrically insulated from each other by respective vitreous insulators (not shown).
  • the electrons emitted from the linear cathode 10b are conducted by an extracting hole 11 of the electron beam extracting electrode 7a to form the electron beam 12. Thereafter, the electron beam 12 passes through holes and slits of the other electrodes 7b, 7c, 7d, 7e, 7f and 7g, thereby being focussed and deflected. Finally, the electron beam 12 reaches a small segment 13a of a fluorescent screen 13 formed on the inner surface of the front housing 1. Many fluorescent dots of R, G and B colors are provided on the small segment 13a by known printing process. The small segment 13a emits light when the electron beam 12 lands on the fluorescent dots of the small segment 13a.
  • the fluorescent screen 13 is divided into only 3 pieces in a vertical line and only 7 pieces in a horizontal line, the fluorescent screen 13 is actually divided into many small segments, such as 44 pieces in the vertical line and 221 pieces in the horizontal line, a total of 9724 pieces.
  • FIG. 1 is an explanatory view showing a supporting unit for a flat-shaped electrode unit in accordance with the present invention.
  • FIG. 2 is an exploded perspective view showing the construction of the supporting unit in accordance with the present invention.
  • FIG. 3 is a partially sectional view, which is taken on line Z--Z of FIG. 8, showing the mounting construction of the supporting unit of the present invention at a corner part of the flat type image display apparatus.
  • the supporting unit 51 for the flat-shaped electrode unit 7 in accordance with the present invention comprises eight setting mounts 52a-52h, a pair of securing members 53a and 53b, a pair of supporting members 54a and 54b, four tension plates 55a-55d, four spring plates 56a-56d and two spacers 57a and 57b.
  • the bonding glass member 19 is heated and melted in a baking oven at the temperature of about 500° C. The melting point of the bonding glass member 19 is selected lower than that of the rear panel 2.
  • the securing member 53a is disposed on the setting mounts 52a, 52b and 52c.
  • a first hole 53aa is formed at the intermediate part of the securing member 53a for welding the securing member 53a to the setting mount 52b.
  • a second hole 53ab is formed at one end part of the securing member 53a for locating the tension plate 55a.
  • a third hole 53ac is formed at the other end part of the securing member 53a for locating the tension plate 55b.
  • FIG. 4A is an enlarged view of welding parts between the securing member 53a and the setting mount 52b.
  • FIG. 4B is a sectional view, which is taken on line 4B--4B of FIG. 4A, showing welding parts between the securing member 53a and the setting mount 52b.
  • the bottom parts of the inner walls of the first hole 53aa are fixed to the upper surface of the setting mount 52b by welding, such as a laser welding. Because this welding of the securing member 53a is performed in the bottom parts of the first hole 53aa, plural welding parts 60 do not protrude above a level of the upper surface of the securing member 53a as shown in FIG. 4A and FIG. 4B. Thereby, it is possible to prevent an undesirable electromagnetic influence on plural parts 60 of the flat type image display apparatus 100.
  • the intermediate part of the securing member 53a is fixed to the setting mount 52b at the first hole 53aa.
  • the securing member 53b is disposed on the setting mounts 52e, 52f and 52g.
  • a first hole 53ba is formed at the intermediate part of the securing member 53b for welding the securing member 53b to the setting mount 52f.
  • a second hole 53bb is formed at one end part of the securing member 53b for locating the tension plate 55d.
  • a third hole 53bc is formed at the other end part of the securing member 53b for locating the tension plate 55c.
  • the intermediate part of the securing member 53b is fixed to the setting mount 52f at the first hole 53ba.
  • both ends of the heat-resistant insulating frame 50a are fitted to both ends of the securing member 53a, respectively.
  • the heat-resistant insulating frame 50a is disposed in parallel with the securing member 53a in the vertical direction.
  • both ends of the heat-resistant insulating frame 50b shown by dashed lines are fitted to both ends of the securing member 53b, respectively.
  • the heat-resistant insulating frame 50b is disposed in parallel with the securing member 53b in the vertical direction.
  • the plural linear cathodes 10 (FIG. 3) are stretched horizontally between the two heat-resistant insulating frames 50a and 50b in parallel with each other.
  • a first hole 54aa is formed at the intermediate part of the supporting member 54a for welding the supporting member 54a to the setting mount 52d.
  • the intermediate part of the supporting member 54a is fixed to the setting mount 52d at the first hole 54aa via the spacer 57a.
  • a first hole 54ba is formed at the intermediate part of the supporting member 54b for welding the supporting member 54b to the setting mount 52h.
  • the intermediate part of the supporting member 54b is fixed to the setting mount 52h at the first hole 54ba via the spacer 57b.
  • both ends of the supporting member 54a are put on one end of the securing members 53a and 53b, and both ends of the supporting member 54b are put on the other end of the securing members 53a and 53b.
  • the securing members 53a and 53b and the supporting members 54a and 54b form a substantially rectangle shaped frame on the eight setting mounts 52a-52h.
  • the securing members 53a and 53b and the supporting members 54a and 54b form supporting means.
  • an insulating film 20 is provided on the upper surface of the supporting member 54a and 54b, and the flat-shaped electrode unit 7 (FIG. 10) is disposed further thereon.
  • the flat-shaped electrode unit 7 At the four corners of the supporting unit 51, the flat-shaped electrode unit 7, the securing members 53a and 53b and the supporting member 54a and 54b are fixed to each other by four securing screws 8a-8d.
  • the insulating film 20 is formed on the upper surface of the securing members 53a and 53b, for example, by thermal spraying of an alumina.
  • a securing position of the securing screw 8a is located at the part outside with respect to the setting mount 52a in relation to the center part of the rear panel 2
  • a securing position of the securing screw 8b is located at the part outside with respect to the setting mount 52c in relation to the center part of the rear panel 2.
  • a securing position of the securing screw 8c is located at the part outside with respect to the setting mount 52e in relation to the center part of the rear panel 2
  • a securing position of the securing screw 8d is located at the part outside with respect to the setting mount 52g in relation to the center part of the rear panel 2.
  • diameters of four holes for inserting respective four screws 8a-8d are set larger than a diameter of four screws 8a-8d.
  • a diameter of a hole 54bb for inserting the screw 8a is set larger than a diameter of the screw 8a.
  • insulating washers 21 are provided between every two flat-shaped electrodes around the securing screws 8a.
  • a metal-backed layer 22 is provided on the inner surface of the fluorescent screen 13.
  • the four tension plates 55a-55d and the four spring plates 56a-56d are made of the alloy, such as a stainless steel.
  • the four tension plates 55a-55d and the four spring plates 56a-56d form resilient retaining means, and are disposed at four corners of supporting means, respectively.
  • the four tension plates 55a-55d and the four spring plates 56a-56d hold four end parts of the securing members 53a and 53b, respectively.
  • FIG. 5 is an enlarged view showing resilient retaining means of the present invention.
  • the tension plate 55a comprises a first hook 55aa, a second hook 55ab, a hole 55ac and a protruding portion 55ad.
  • the spring plate 56a has a hole 56aa.
  • Each of the first hook 55aa and the second hook 5 serves as a stopper to limit deformations of the securing member 53a. That is, when the tension plate 55a is fixed to the setting mount 52a, each of the first hook 55aa and the second hook 55ab is disposed above the upper surface of the securing member 53a as shown in FIG. 3.
  • first hook 55aa and the second hook 55ab come in contact with one end part of the securing member 53a, respectively.
  • deformations of the securing member 53a is limited to a predetermined degree. It is possible that the first hook 55aa and the second hook 55ab also limit deformations of the securing member 53a caused by external vibration and shock.
  • tension plate 55a has two hooks 55aa and 55ab as the stopper
  • an alternative construction may be such that the tension plate 55a has one hook, for example, the first hook 55aa only.
  • the hole 55ac is formed in the tension plate 55a for welding the tension plate 55a to the setting mount 52a. Because this welding of the tension plate 55a is performed in the bottom parts of the hole 55ac as well as the welding of the securing member 53a, plural welding parts 58 do not protrude above a level of the surface of the tension plate 55a as shown in FIG. 3.
  • the protruding portion 55ad is provided on one surface of the tension plate 55a so as to project toward the rear panel 2. This protruding portion 55ad is formed by pushing the other surface of the tension plate 55a.
  • the spring plate 56a is fixed to a rear side of the securing member 53a so as to cover a predetermined part of the second hole 53ab. Because this welding of the spring plate 56a is performed in the bottom parts of the hole 55ac as well as the welding of the securing member 53a, plural welding parts 59 do not protrude above a level of the surface of the spring plate 56a as shown in FIG. 3.
  • an alternative construction may be such that the spring plate 56a and the securing member 53a are formed integrally, and the securing member 53a is held by the elasticity of the tension plate 55a.
  • the protruding portion 55ad of the tension plate 55a only abuts on the spring plate 56a. Therefore, when the tension plate 55a is moved with the tilt to the spring plate 56a, it is possible that the tension plate 55a smoothly tilts to the spring plate 56a.
  • each of the tension plates 55b, 55c and 55d is configured the same as the tension plate 55a
  • each of the spring plates 56b, 56c and 56d is configured as same as the spring plate 56a. That is, in FIG. 1, each of hooks 55ba, 55ca and 55da correspond to the first hook 55aa, and each of hooks 55bb, 55cb and 55db correspond to the second hook 55ab. Furthermore, each of holes 55bc, 55cc and 55dc correspond to the hole 55ac, and each of holes 56ba, 56ca and 56da correspond to the hole 56aa.
  • a protruding portion (not shown) is provided on the tension plates 55b, 55c and 55d for abutting on the respective the spring plates 56b, 56c and 56d. Therefore, explanations of the tension plates 55b, 55c and 55d and the spring plates 56b, 56c and 56d are omitted.
  • the spacer 57a is provided between the supporting member 54a and the setting mount 52d.
  • the spacer 57a is fixed to the supporting member 54a and the setting mount 52d at a hole 57aa (FIG. 6) by welding.
  • This welding method of the spacer 57a is as same as the welding method of the securing member 53a.
  • the spacer 57b is provided between the supporting member 54b and the setting mount 52h.
  • the spacer 57b is fixed to the supporting member 54b and the setting mount 52h at a hole 57ba (FIG. 2) by welding.
  • This welding method of the spacer 57b is as same as the welding method of the securing member 53a.
  • FIG. 6 is a lateral view showing the supporting unit in accordance with the present invention. Because the spacer 57b is configured as same as the spacer 57a, the explanation of the spacer 57b applies as it is to the former, and hence its explanation is omitted.
  • thickness of the spacer 57a is smaller than those of the securing members 53a and 53b. Furthermore, three setting mounts 52c, 52d and 52e are fixed to the rear panel 2 with a predetermined height from the rear panel 2. Accordingly, the height of the supporting member 54a from the rear panel 2, a height of the intermediate part is lower than the heights of both end parts. That is, the intermediate part of the supporting member 54a is fixed to the setting mount 52d via the spacer 57a so that a clearance 61 is formed between the intermediate part of the supporting member 54a and the flat-shaped electrode unit 7. For example, the clearance 61 is about 40 microns between the insulating film 20 and the flat-shaped electrode unit 7.
  • the rear panel 2 When the vacuum case is evacuated by the evacuation pipe 4, the rear panel 2 is deformed into the rear panel 2' shown by dashed lines of FIG. 6. Thereby, the intermediate part of the supporting member 54a is pushed toward the flat-shaped electrode unit 7 via the setting mount 52d and the spacer 57a.
  • the clearance 61 since the clearance 61 is provided between the intermediate part of the supporting member 54a and the flat-shaped electrode unit 7, the intermediate part of the supporting member 54a does not come in contact with the flat-shaped electrode unit 7.
  • the clearance 61 absorbs the deformation of the supporting member 54a eliminating from giving an undesirable stress to the flat-shaped electrode unit 7.
  • an alternative construction may be such that the height of the setting mount 52d from the rear panel 2 is lower than those of the setting mounts 52c and 52e without the spacer 57a.
  • the countermeasure against the evacuation of the vacuum case is not required. That is because, for example, as shown in FIG. 3, the securing member 53a is disposed under the supporting member 54b against the flat-shaped electrode unit 7. Thereby, when the vacuum case is evacuated by the evacuation pipe 4, the intermediate part of the securing member 53a does not come in contact with the flat-shaped electrode unit 7 after the intermediate part of the securing member 53a is pushed toward the flat-shaped electrode unit 7 via the setting mount 52b (FIG. 1). As has been elucidated in the above, the heat-resistant insulating frame 50a are only fitted to the securing member 53a at both ends of the heat-resistant insulating frame 50a.
  • the intermediate part of the heat-resistant insulating frame 50a does not push the flat-shaped electrode unit 7.
  • the plural linear cathodes 10 does not receive an undesirable stress from the heat-resistant insulating frame 50a.
  • the flat-shaped electrode unit 7 and the plural linear cathodes 10 do not receive an undesirable stress. These functions against the flat-shaped electrode unit 7 and the plural linear cathodes 10 are effectively performed not only in deformations caused by the evacuation but also deformations caused by heat, the external vibrations and shocks.
  • the supporting unit 51 of the present invention has technical advantages as follows:
  • the four intermediate parts of the frame are fixed to the rear panel 2 via the respective setting mounts 52b, 52d, 52f and 52h, and the four corners of the frame are held by the resilient retaining means consisted of the tension plates 55a-55d and the spring plates 56a-56d. Therefore, the four corners of the frame make the largest displacement from the corresponding parts on the rear panel 2, the flat-shaped electrode unit 7 and the frame.
  • the resilient retaining means eliminates the largest difference given to the flat-shaped electrode unit 7 through moving of the tension plates 55a-55d in the respective holes 53ab, 53ac, 53bb and 53bc. Accordingly, it is possible to prevent generations of the cracks in the rear panel 2 and the bonding glass member 19 for fixing the setting mounts 52a-52h.
  • the tension plates 55a, 55b, 55c and 55d are disposed in the holes 53ab, 53ac, 53bb and 53bc, respectively, so as to form three gaps G1, G2 and G3 in the respective holes 53ab, 53ac, 53bb and 53bc.
  • the clearance 61 is provided between the flat-shaped electrode unit 7 and the supporting members 54a and 54b.
  • the output terminals 6 are pulled toward the part outside of the vacuum case with a predetermined force.
  • a curve part 6b of the output terminal 6 is likely to be pulled toward a connecting part 6a of the output terminal 6 by the thermal deformation of the flat-shaped electrode 7b.
  • the output terminal 6 is pulled with a predetermined force in a direction of an arrow "U" of FIG. 3. As a result, it is possible to prevent the thermal deformation of the flat-shaped electrode 7b.
  • FIG. 7 is a front view of a modified version of the supporting unit in accordance with the preferred embodiment of the present invention.
  • the same components and parts as those of the preferred embodiment are designated by the same numerals, and corresponding descriptions similarly apply. Therefore, the descriptions will be made mainly on the modified parts from the preferred embodiment.
  • the frame of the supporting unit 51 and the flat-shaped electrode unit 7 are made of a metal, such as Fe.
  • the tension plate 55a' When the flat type image display apparatus 100 is heated, the tension plate 55a' is moved toward the part inside in relation to the center part of the rear panel 2. As a result, the tension plate 55a' absorbs a difference in degrees of thermal deformations between the rear panel 2, the flat-shaped electrode unit 7 and the frame of the supporting unit 51 without giving an undesirable stress to the flat-shaped electrode unit 7.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Laser Beam Processing (AREA)
US08/312,865 1993-09-30 1994-09-27 Elastic restraint for flat panel displays Expired - Lifetime US5554910A (en)

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US08/530,642 US6109993A (en) 1993-09-30 1995-09-20 Flat type image display apparatus and fabrication method therefor

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JP5-244565 1993-09-30
JP05244565A JP3119052B2 (ja) 1993-09-30 1993-09-30 平板状画像表示装置

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Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
JPH11191383A (ja) 1997-12-26 1999-07-13 Matsushita Electron Corp 平板状画像表示装置
KR100600892B1 (ko) * 2001-07-23 2006-07-14 엘지.필립스 디스플레이 주식회사 음극선관
FR2835390B1 (fr) * 2002-01-31 2005-11-25 Valeo Electronique Procede et equipement de soudage de conducteurs sur des substrats
CA2546532A1 (en) * 2004-02-13 2005-08-25 Temco Japan Co., Ltd. Bone-conduction device and method of manufacturing the same
CN110666427B (zh) * 2019-10-30 2021-07-09 张家港市固业金属制品有限公司 一种电视机支架热熔焊接用定位机构

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050295A1 (en) * 1980-10-20 1982-04-28 Matsushita Electric Industrial Co., Ltd. A method for making an electrode construction for a flat-type display device and an electrode construction obtained by this method
EP0316871A2 (en) * 1987-11-16 1989-05-24 Matsushita Electric Industrial Co., Ltd. Image display apparatus
JPH0367444A (ja) * 1989-08-04 1991-03-22 Matsushita Electric Ind Co Ltd 画像表示装置
US5172028A (en) * 1989-09-14 1992-12-15 Futaba Denshi Kogyo K.K. Fluorescent display device
US5175467A (en) * 1990-08-10 1992-12-29 Matsushita Electric Industrial Co., Ltd. Flat display panel assembly
US5232389A (en) * 1990-06-05 1993-08-03 Matsushita Electric Industrial Co., Ltd. Flat panel display device and a method of making the same
US5256937A (en) * 1989-04-07 1993-10-26 Nokia (Deutschland) Gmbh Flat panel fluorescent screen display tube
US5272413A (en) * 1990-06-05 1993-12-21 Matsushita Electric Industrial Co., Ltd. Flat panel display device and a method of making the same
JPH0668819A (ja) * 1992-08-24 1994-03-11 Matsushita Electric Ind Co Ltd 平板型表示装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666911A (en) * 1970-01-23 1972-05-30 Sperry Rand Corp Method for manufacturing planar raised cathode gas tubes
US4303847A (en) * 1979-06-22 1981-12-01 Lucitron, Inc. Flat-panel display with gas-impervious metallic sheet forming part of sealed enclosure
DE3036671A1 (de) * 1980-09-29 1982-05-13 Siemens AG, 1000 Berlin und 8000 München Flacher bildschirm, verfahren zu seiner herstellung und seine verwendung
US4517489A (en) * 1983-09-22 1985-05-14 Rca Corporation Modulator structure and method for flat panel display devices
JP3097185B2 (ja) * 1991-06-28 2000-10-10 松下電器産業株式会社 平面型表示装置の製造方法

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050295A1 (en) * 1980-10-20 1982-04-28 Matsushita Electric Industrial Co., Ltd. A method for making an electrode construction for a flat-type display device and an electrode construction obtained by this method
US4493666A (en) * 1980-10-20 1985-01-15 Matsushita Electric Industrial Co., Ltd. Electrode construction and method of making the same
EP0316871A2 (en) * 1987-11-16 1989-05-24 Matsushita Electric Industrial Co., Ltd. Image display apparatus
US4955681A (en) * 1987-11-16 1990-09-11 Matsushita Electric Industrial Co., Ltd. Image display apparatus having sheet like vertical and horizontal deflection electrodes
US5256937A (en) * 1989-04-07 1993-10-26 Nokia (Deutschland) Gmbh Flat panel fluorescent screen display tube
JPH0367444A (ja) * 1989-08-04 1991-03-22 Matsushita Electric Ind Co Ltd 画像表示装置
US5172028A (en) * 1989-09-14 1992-12-15 Futaba Denshi Kogyo K.K. Fluorescent display device
US5232389A (en) * 1990-06-05 1993-08-03 Matsushita Electric Industrial Co., Ltd. Flat panel display device and a method of making the same
US5272413A (en) * 1990-06-05 1993-12-21 Matsushita Electric Industrial Co., Ltd. Flat panel display device and a method of making the same
US5175467A (en) * 1990-08-10 1992-12-29 Matsushita Electric Industrial Co., Ltd. Flat display panel assembly
JPH0668819A (ja) * 1992-08-24 1994-03-11 Matsushita Electric Ind Co Ltd 平板型表示装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patent Abstract of Japan, vol. 18, No. 308 (E 1560) Jun. 1994 re JP A 06068819. *
Patent Abstract of Japan, vol. 18, No. 308 (E-1560) Jun. 1994 re JP-A 06068819.

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US6109993A (en) 2000-08-29
EP0646946A3 (en) 1995-11-02
KR950009888A (ko) 1995-04-26
DE69411484T2 (de) 1998-11-26
JPH07105878A (ja) 1995-04-21
KR0169342B1 (ko) 1999-01-15
EP0646946B1 (en) 1998-07-08
DE69411484D1 (de) 1998-08-13
JP3119052B2 (ja) 2000-12-18
EP0764964A1 (en) 1997-03-26
EP0646946A2 (en) 1995-04-05

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